Draw a labelled diagram of the chloroplast and name and describe the two phases of photosynthesis.

Here are the answers to the questions:

1.1.4. Draw a labelled diagram of the organelle present in the leaves of the plants where Photosynthesis takes place.

• The organelle is the chloroplast. Your diagram should include:
  • An outer membrane
  • An inner membrane
  • Stroma (the fluid-filled space)
  • Thylakoids (disc-shaped sacs)
  • Grana (stacks of thylakoids)
  • Lamellae (connections between grana)

1.1.5. The rate or speed at which photosynthesis takes place depends on the following three factors:

• a) Light intensity
• b) Carbon dioxide concentration
• c) Temperature

1.1.6. Name and describe TWO phases of Photosynthesis:

• Name: Light-dependent phase
  • Describe: This phase occurs in the thylakoid membranes of the chloroplast. It requires light energy to split water molecules (photolysis), releasing oxygen and producing ATP and NADPH.
• Name: Light-independent phase (or Calvin cycle)
  • Describe: This phase occurs in the stroma of the chloroplast. It does not directly require light but uses the ATP and NADPH produced during the light-dependent phase to fix carbon dioxide and convert it into glucose.